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ath6kl: move all credit distribution code to htc.c
As htc is the only user there's no reason to keep it in main.c. No functional changes. Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo
parent
3c3703987a
commit
f2f921950d
@ -78,16 +78,6 @@ struct ath6kl;
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enum htc_credit_dist_reason;
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struct ath6kl_htc_credit_info;
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int ath6kl_setup_credit_dist(void *htc_handle,
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struct ath6kl_htc_credit_info *cred_info);
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void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_inf,
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struct list_head *epdist_list,
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enum htc_credit_dist_reason reason);
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void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_inf,
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struct list_head *ep_list,
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int tot_credits);
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void ath6kl_seek_credits(struct ath6kl_htc_credit_info *cred_inf,
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struct htc_endpoint_credit_dist *ep_dist);
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struct ath6kl *ath6kl_core_alloc(struct device *sdev);
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int ath6kl_core_init(struct ath6kl *ar);
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void ath6kl_core_cleanup(struct ath6kl *ar);
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@ -570,16 +570,6 @@ static inline void *ath6kl_priv(struct net_device *dev)
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return ((struct ath6kl_vif *) netdev_priv(dev))->ar;
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}
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static inline void ath6kl_deposit_credit_to_ep(struct ath6kl_htc_credit_info
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*cred_info,
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struct htc_endpoint_credit_dist
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*ep_dist, int credits)
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{
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ep_dist->credits += credits;
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ep_dist->cred_assngd += credits;
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cred_info->cur_free_credits -= credits;
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}
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static inline u32 ath6kl_get_hi_item_addr(struct ath6kl *ar,
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u32 item_offset)
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{
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@ -22,6 +22,298 @@
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#define CALC_TXRX_PADDED_LEN(dev, len) (__ALIGN_MASK((len), (dev)->block_mask))
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/* Functions for Tx credit handling */
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static void ath6kl_deposit_credit_to_ep(struct ath6kl_htc_credit_info
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*cred_info,
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struct htc_endpoint_credit_dist
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*ep_dist, int credits)
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{
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ep_dist->credits += credits;
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ep_dist->cred_assngd += credits;
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cred_info->cur_free_credits -= credits;
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}
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static void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info,
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struct list_head *ep_list,
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int tot_credits)
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{
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struct htc_endpoint_credit_dist *cur_ep_dist;
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int count;
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cred_info->cur_free_credits = tot_credits;
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cred_info->total_avail_credits = tot_credits;
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list_for_each_entry(cur_ep_dist, ep_list, list) {
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if (cur_ep_dist->endpoint == ENDPOINT_0)
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continue;
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cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
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if (tot_credits > 4) {
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if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
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(cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
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ath6kl_deposit_credit_to_ep(cred_info,
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cur_ep_dist,
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cur_ep_dist->cred_min);
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cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
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}
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}
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if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
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ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
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cur_ep_dist->cred_min);
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/*
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* Control service is always marked active, it
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* never goes inactive EVER.
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*/
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cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
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} else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
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/* this is the lowest priority data endpoint */
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/* FIXME: this looks fishy, check */
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cred_info->lowestpri_ep_dist = cur_ep_dist->list;
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/*
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* Streams have to be created (explicit | implicit) for all
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* kinds of traffic. BE endpoints are also inactive in the
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* beginning. When BE traffic starts it creates implicit
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* streams that redistributes credits.
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*
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* Note: all other endpoints have minimums set but are
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* initially given NO credits. credits will be distributed
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* as traffic activity demands
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*/
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}
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WARN_ON(cred_info->cur_free_credits <= 0);
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list_for_each_entry(cur_ep_dist, ep_list, list) {
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if (cur_ep_dist->endpoint == ENDPOINT_0)
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continue;
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if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
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cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
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else {
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/*
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* For the remaining data endpoints, we assume that
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* each cred_per_msg are the same. We use a simple
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* calculation here, we take the remaining credits
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* and determine how many max messages this can
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* cover and then set each endpoint's normal value
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* equal to 3/4 this amount.
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*/
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count = (cred_info->cur_free_credits /
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cur_ep_dist->cred_per_msg)
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* cur_ep_dist->cred_per_msg;
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count = (count * 3) >> 2;
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count = max(count, cur_ep_dist->cred_per_msg);
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cur_ep_dist->cred_norm = count;
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}
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}
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}
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/* initialize and setup credit distribution */
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int ath6kl_setup_credit_dist(void *htc_handle,
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struct ath6kl_htc_credit_info *cred_info)
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{
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u16 servicepriority[5];
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memset(cred_info, 0, sizeof(struct ath6kl_htc_credit_info));
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servicepriority[0] = WMI_CONTROL_SVC; /* highest */
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servicepriority[1] = WMI_DATA_VO_SVC;
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servicepriority[2] = WMI_DATA_VI_SVC;
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servicepriority[3] = WMI_DATA_BE_SVC;
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servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
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/* set priority list */
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ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
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return 0;
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}
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/* reduce an ep's credits back to a set limit */
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static void ath6kl_reduce_credits(struct ath6kl_htc_credit_info *cred_info,
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struct htc_endpoint_credit_dist *ep_dist,
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int limit)
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{
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int credits;
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ep_dist->cred_assngd = limit;
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if (ep_dist->credits <= limit)
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return;
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credits = ep_dist->credits - limit;
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ep_dist->credits -= credits;
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cred_info->cur_free_credits += credits;
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}
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static void ath6kl_credit_update(struct ath6kl_htc_credit_info *cred_info,
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struct list_head *epdist_list)
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{
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struct htc_endpoint_credit_dist *cur_dist_list;
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list_for_each_entry(cur_dist_list, epdist_list, list) {
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if (cur_dist_list->endpoint == ENDPOINT_0)
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continue;
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if (cur_dist_list->cred_to_dist > 0) {
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cur_dist_list->credits +=
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cur_dist_list->cred_to_dist;
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cur_dist_list->cred_to_dist = 0;
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if (cur_dist_list->credits >
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cur_dist_list->cred_assngd)
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ath6kl_reduce_credits(cred_info,
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cur_dist_list,
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cur_dist_list->cred_assngd);
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if (cur_dist_list->credits >
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cur_dist_list->cred_norm)
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ath6kl_reduce_credits(cred_info, cur_dist_list,
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cur_dist_list->cred_norm);
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if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
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if (cur_dist_list->txq_depth == 0)
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ath6kl_reduce_credits(cred_info,
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cur_dist_list, 0);
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}
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}
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}
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}
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/*
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* HTC has an endpoint that needs credits, ep_dist is the endpoint in
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* question.
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*/
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static void ath6kl_seek_credits(struct ath6kl_htc_credit_info *cred_info,
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struct htc_endpoint_credit_dist *ep_dist)
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{
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struct htc_endpoint_credit_dist *curdist_list;
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int credits = 0;
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int need;
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if (ep_dist->svc_id == WMI_CONTROL_SVC)
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goto out;
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if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
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(ep_dist->svc_id == WMI_DATA_VO_SVC))
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if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
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goto out;
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/*
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* For all other services, we follow a simple algorithm of:
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*
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* 1. checking the free pool for credits
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* 2. checking lower priority endpoints for credits to take
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*/
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credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
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if (credits >= ep_dist->seek_cred)
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goto out;
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/*
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* We don't have enough in the free pool, try taking away from
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* lower priority services The rule for taking away credits:
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*
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* 1. Only take from lower priority endpoints
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* 2. Only take what is allocated above the minimum (never
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* starve an endpoint completely)
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* 3. Only take what you need.
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*/
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list_for_each_entry_reverse(curdist_list,
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&cred_info->lowestpri_ep_dist,
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list) {
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if (curdist_list == ep_dist)
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break;
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need = ep_dist->seek_cred - cred_info->cur_free_credits;
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if ((curdist_list->cred_assngd - need) >=
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curdist_list->cred_min) {
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/*
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* The current one has been allocated more than
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* it's minimum and it has enough credits assigned
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* above it's minimum to fulfill our need try to
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* take away just enough to fulfill our need.
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*/
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ath6kl_reduce_credits(cred_info, curdist_list,
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curdist_list->cred_assngd - need);
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if (cred_info->cur_free_credits >=
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ep_dist->seek_cred)
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break;
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}
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if (curdist_list->endpoint == ENDPOINT_0)
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break;
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}
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credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
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out:
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/* did we find some credits? */
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if (credits)
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ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
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ep_dist->seek_cred = 0;
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}
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/* redistribute credits based on activity change */
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static void ath6kl_redistribute_credits(struct ath6kl_htc_credit_info *info,
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struct list_head *ep_dist_list)
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{
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struct htc_endpoint_credit_dist *curdist_list;
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list_for_each_entry(curdist_list, ep_dist_list, list) {
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if (curdist_list->endpoint == ENDPOINT_0)
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continue;
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if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
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(curdist_list->svc_id == WMI_DATA_BE_SVC))
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curdist_list->dist_flags |= HTC_EP_ACTIVE;
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if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
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!(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
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if (curdist_list->txq_depth == 0)
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ath6kl_reduce_credits(info, curdist_list, 0);
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else
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ath6kl_reduce_credits(info,
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curdist_list,
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curdist_list->cred_min);
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}
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}
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}
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/*
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*
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* This function is invoked whenever endpoints require credit
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* distributions. A lock is held while this function is invoked, this
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* function shall NOT block. The ep_dist_list is a list of distribution
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* structures in prioritized order as defined by the call to the
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* htc_set_credit_dist() api.
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*/
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static void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_info,
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struct list_head *ep_dist_list,
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enum htc_credit_dist_reason reason)
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{
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switch (reason) {
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case HTC_CREDIT_DIST_SEND_COMPLETE:
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ath6kl_credit_update(cred_info, ep_dist_list);
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break;
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case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
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ath6kl_redistribute_credits(cred_info, ep_dist_list);
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break;
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default:
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break;
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}
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WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
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WARN_ON(cred_info->cur_free_credits < 0);
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}
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static void ath6kl_htc_tx_buf_align(u8 **buf, unsigned long len)
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{
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u8 *align_addr;
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@ -570,6 +570,9 @@ int ath6kl_htc_add_rxbuf_multiple(struct htc_target *target,
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int ath6kl_htc_rxmsg_pending_handler(struct htc_target *target,
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u32 msg_look_ahead, int *n_pkts);
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int ath6kl_setup_credit_dist(void *htc_handle,
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struct ath6kl_htc_credit_info *cred_info);
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static inline void set_htc_pkt_info(struct htc_packet *packet, void *context,
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u8 *buf, unsigned int len,
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enum htc_endpoint_id eid, u16 tag)
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@ -555,288 +555,6 @@ void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr,
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netif_wake_queue(vif->ndev);
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}
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/* Functions for Tx credit handling */
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void ath6kl_credit_init(struct ath6kl_htc_credit_info *cred_info,
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struct list_head *ep_list,
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int tot_credits)
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{
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struct htc_endpoint_credit_dist *cur_ep_dist;
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int count;
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cred_info->cur_free_credits = tot_credits;
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cred_info->total_avail_credits = tot_credits;
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list_for_each_entry(cur_ep_dist, ep_list, list) {
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if (cur_ep_dist->endpoint == ENDPOINT_0)
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continue;
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cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg;
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if (tot_credits > 4) {
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if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) ||
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(cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) {
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ath6kl_deposit_credit_to_ep(cred_info,
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cur_ep_dist,
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cur_ep_dist->cred_min);
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cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
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}
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}
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if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) {
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ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist,
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cur_ep_dist->cred_min);
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/*
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* Control service is always marked active, it
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* never goes inactive EVER.
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*/
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cur_ep_dist->dist_flags |= HTC_EP_ACTIVE;
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} else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC)
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/* this is the lowest priority data endpoint */
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/* FIXME: this looks fishy, check */
|
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cred_info->lowestpri_ep_dist = cur_ep_dist->list;
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|
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/*
|
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* Streams have to be created (explicit | implicit) for all
|
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* kinds of traffic. BE endpoints are also inactive in the
|
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* beginning. When BE traffic starts it creates implicit
|
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* streams that redistributes credits.
|
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*
|
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* Note: all other endpoints have minimums set but are
|
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* initially given NO credits. credits will be distributed
|
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* as traffic activity demands
|
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*/
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}
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WARN_ON(cred_info->cur_free_credits <= 0);
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list_for_each_entry(cur_ep_dist, ep_list, list) {
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if (cur_ep_dist->endpoint == ENDPOINT_0)
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continue;
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if (cur_ep_dist->svc_id == WMI_CONTROL_SVC)
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cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg;
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else {
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/*
|
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* For the remaining data endpoints, we assume that
|
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* each cred_per_msg are the same. We use a simple
|
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* calculation here, we take the remaining credits
|
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* and determine how many max messages this can
|
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* cover and then set each endpoint's normal value
|
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* equal to 3/4 this amount.
|
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*/
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count = (cred_info->cur_free_credits /
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cur_ep_dist->cred_per_msg)
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* cur_ep_dist->cred_per_msg;
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count = (count * 3) >> 2;
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count = max(count, cur_ep_dist->cred_per_msg);
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cur_ep_dist->cred_norm = count;
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}
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}
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}
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/* initialize and setup credit distribution */
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int ath6kl_setup_credit_dist(void *htc_handle,
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struct ath6kl_htc_credit_info *cred_info)
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{
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u16 servicepriority[5];
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memset(cred_info, 0, sizeof(struct ath6kl_htc_credit_info));
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servicepriority[0] = WMI_CONTROL_SVC; /* highest */
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servicepriority[1] = WMI_DATA_VO_SVC;
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servicepriority[2] = WMI_DATA_VI_SVC;
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servicepriority[3] = WMI_DATA_BE_SVC;
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servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */
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/* set priority list */
|
||||
ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* reduce an ep's credits back to a set limit */
|
||||
static void ath6kl_reduce_credits(struct ath6kl_htc_credit_info *cred_info,
|
||||
struct htc_endpoint_credit_dist *ep_dist,
|
||||
int limit)
|
||||
{
|
||||
int credits;
|
||||
|
||||
ep_dist->cred_assngd = limit;
|
||||
|
||||
if (ep_dist->credits <= limit)
|
||||
return;
|
||||
|
||||
credits = ep_dist->credits - limit;
|
||||
ep_dist->credits -= credits;
|
||||
cred_info->cur_free_credits += credits;
|
||||
}
|
||||
|
||||
static void ath6kl_credit_update(struct ath6kl_htc_credit_info *cred_info,
|
||||
struct list_head *epdist_list)
|
||||
{
|
||||
struct htc_endpoint_credit_dist *cur_dist_list;
|
||||
|
||||
list_for_each_entry(cur_dist_list, epdist_list, list) {
|
||||
if (cur_dist_list->endpoint == ENDPOINT_0)
|
||||
continue;
|
||||
|
||||
if (cur_dist_list->cred_to_dist > 0) {
|
||||
cur_dist_list->credits +=
|
||||
cur_dist_list->cred_to_dist;
|
||||
cur_dist_list->cred_to_dist = 0;
|
||||
if (cur_dist_list->credits >
|
||||
cur_dist_list->cred_assngd)
|
||||
ath6kl_reduce_credits(cred_info,
|
||||
cur_dist_list,
|
||||
cur_dist_list->cred_assngd);
|
||||
|
||||
if (cur_dist_list->credits >
|
||||
cur_dist_list->cred_norm)
|
||||
ath6kl_reduce_credits(cred_info, cur_dist_list,
|
||||
cur_dist_list->cred_norm);
|
||||
|
||||
if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) {
|
||||
if (cur_dist_list->txq_depth == 0)
|
||||
ath6kl_reduce_credits(cred_info,
|
||||
cur_dist_list, 0);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* HTC has an endpoint that needs credits, ep_dist is the endpoint in
|
||||
* question.
|
||||
*/
|
||||
void ath6kl_seek_credits(struct ath6kl_htc_credit_info *cred_info,
|
||||
struct htc_endpoint_credit_dist *ep_dist)
|
||||
{
|
||||
struct htc_endpoint_credit_dist *curdist_list;
|
||||
int credits = 0;
|
||||
int need;
|
||||
|
||||
if (ep_dist->svc_id == WMI_CONTROL_SVC)
|
||||
goto out;
|
||||
|
||||
if ((ep_dist->svc_id == WMI_DATA_VI_SVC) ||
|
||||
(ep_dist->svc_id == WMI_DATA_VO_SVC))
|
||||
if ((ep_dist->cred_assngd >= ep_dist->cred_norm))
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* For all other services, we follow a simple algorithm of:
|
||||
*
|
||||
* 1. checking the free pool for credits
|
||||
* 2. checking lower priority endpoints for credits to take
|
||||
*/
|
||||
|
||||
credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
|
||||
|
||||
if (credits >= ep_dist->seek_cred)
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* We don't have enough in the free pool, try taking away from
|
||||
* lower priority services The rule for taking away credits:
|
||||
*
|
||||
* 1. Only take from lower priority endpoints
|
||||
* 2. Only take what is allocated above the minimum (never
|
||||
* starve an endpoint completely)
|
||||
* 3. Only take what you need.
|
||||
*/
|
||||
|
||||
list_for_each_entry_reverse(curdist_list,
|
||||
&cred_info->lowestpri_ep_dist,
|
||||
list) {
|
||||
if (curdist_list == ep_dist)
|
||||
break;
|
||||
|
||||
need = ep_dist->seek_cred - cred_info->cur_free_credits;
|
||||
|
||||
if ((curdist_list->cred_assngd - need) >=
|
||||
curdist_list->cred_min) {
|
||||
/*
|
||||
* The current one has been allocated more than
|
||||
* it's minimum and it has enough credits assigned
|
||||
* above it's minimum to fulfill our need try to
|
||||
* take away just enough to fulfill our need.
|
||||
*/
|
||||
ath6kl_reduce_credits(cred_info, curdist_list,
|
||||
curdist_list->cred_assngd - need);
|
||||
|
||||
if (cred_info->cur_free_credits >=
|
||||
ep_dist->seek_cred)
|
||||
break;
|
||||
}
|
||||
|
||||
if (curdist_list->endpoint == ENDPOINT_0)
|
||||
break;
|
||||
}
|
||||
|
||||
credits = min(cred_info->cur_free_credits, ep_dist->seek_cred);
|
||||
|
||||
out:
|
||||
/* did we find some credits? */
|
||||
if (credits)
|
||||
ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits);
|
||||
|
||||
ep_dist->seek_cred = 0;
|
||||
}
|
||||
|
||||
/* redistribute credits based on activity change */
|
||||
static void ath6kl_redistribute_credits(struct ath6kl_htc_credit_info *info,
|
||||
struct list_head *ep_dist_list)
|
||||
{
|
||||
struct htc_endpoint_credit_dist *curdist_list;
|
||||
|
||||
list_for_each_entry(curdist_list, ep_dist_list, list) {
|
||||
if (curdist_list->endpoint == ENDPOINT_0)
|
||||
continue;
|
||||
|
||||
if ((curdist_list->svc_id == WMI_DATA_BK_SVC) ||
|
||||
(curdist_list->svc_id == WMI_DATA_BE_SVC))
|
||||
curdist_list->dist_flags |= HTC_EP_ACTIVE;
|
||||
|
||||
if ((curdist_list->svc_id != WMI_CONTROL_SVC) &&
|
||||
!(curdist_list->dist_flags & HTC_EP_ACTIVE)) {
|
||||
if (curdist_list->txq_depth == 0)
|
||||
ath6kl_reduce_credits(info, curdist_list, 0);
|
||||
else
|
||||
ath6kl_reduce_credits(info,
|
||||
curdist_list,
|
||||
curdist_list->cred_min);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
*
|
||||
* This function is invoked whenever endpoints require credit
|
||||
* distributions. A lock is held while this function is invoked, this
|
||||
* function shall NOT block. The ep_dist_list is a list of distribution
|
||||
* structures in prioritized order as defined by the call to the
|
||||
* htc_set_credit_dist() api.
|
||||
*/
|
||||
void ath6kl_credit_distribute(struct ath6kl_htc_credit_info *cred_info,
|
||||
struct list_head *ep_dist_list,
|
||||
enum htc_credit_dist_reason reason)
|
||||
{
|
||||
switch (reason) {
|
||||
case HTC_CREDIT_DIST_SEND_COMPLETE:
|
||||
ath6kl_credit_update(cred_info, ep_dist_list);
|
||||
break;
|
||||
case HTC_CREDIT_DIST_ACTIVITY_CHANGE:
|
||||
ath6kl_redistribute_credits(cred_info, ep_dist_list);
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
|
||||
WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits);
|
||||
WARN_ON(cred_info->cur_free_credits < 0);
|
||||
}
|
||||
|
||||
void disconnect_timer_handler(unsigned long ptr)
|
||||
{
|
||||
struct net_device *dev = (struct net_device *)ptr;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user